/*$$
 * Copyright (c) 1999, Trustees of the University of Chicago
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with 
 * or without modification, are permitted provided that the following 
 * conditions are met:
 *
 *	 Redistributions of source code must retain the above copyright notice,
 *	 this list of conditions and the following disclaimer.
 *
 *	 Redistributions in binary form must reproduce the above copyright notice,
 *	 this list of conditions and the following disclaimer in the documentation
 *	 and/or other materials provided with the distribution.
 *
 * Neither the name of the University of Chicago nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE TRUSTEES OR
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 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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package uchicago.src.reflector;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * Abstract super class for specialized invoker subclasses. Sub classes
 * are specialized according the the parameter type. Intended to invoke methods
 * having a single argument, and no return value. Especially setXXX accessor
 * methods.
 *
 * @author Nick Collier
 * @version $Revision: 1.3 $ $Date: 2004/11/03 19:51:05 $
 */

public abstract class Invoker {

  Method method = null;
  String param = null;
  Object object = null;

  public Invoker (Object o, Method method, String param) {
    this.method = method;
    this.param = param;
    object = o;
  }

  public void execute() throws InvokerException,
    InvocationTargetException, IllegalAccessException
  {
    check();
    invoke();
  }

  protected void check() throws InvokerException {

  }

  protected abstract void invoke() throws InvocationTargetException,
    IllegalAccessException;
}